Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4225113 | Butterfly valve having cartridge construction with improved bearings | Dale R. Clausing, Albert W. Libke, Donald R. Trott | 1980-09-30 |
| 4225114 | Butterfly valve with improved shaft connection | Dale R. Clausing, Albert W. Libke, Donald R. Trott | 1980-09-30 |